Cutting attachment for looms



' Sept. 13, 1927.

R MARX CUTTING ATTACHMENT FOR LOOMS Filed April 6. 1925 NIT ETD STA V RICHARD1MARX, or PHILADELPHIA, PENNSYLVANIA.

Patented Sept. 13, 1927.

res.

PATENT OFFICE.

CUTTING ATTACHMENT FOR LOOMS i I Y Application filedApril s, 1925. Serial No. 21,039.

forming the subject of U. S. Patent No.

4 1,496,241, issued June 3,1924 I The principal object of the invention is to I provide animproved, simplified, and compact mechanism for actuating the shears. A more specific ob ect of the invention is j to prov de shear actuating mechanism capable of longuse warmer developing appreciablelost motion; a

Another object ment to accommodate for variations'in different looms, thereby 'afl'ording'an attach ment that is universally applicable.

The invention further contemplates pro vision of mechanism capable of-use for either a single or double shear bar.

In the attached drawings:

Figure 1 is a side elevation of a cutting attachment made in accordance with the present invention, and

Fig. 2 is a rear elevation of the device, With reference to the drawings, the attachment comprises a beam 1 which constitutes'a support and which may be mounted transversely of the loom. On this beam, which may be the breast beam of the loom,

are mounted two upright brackets 2 and 3 se-\ cured to the beam in the present instance by screws 4, 4, and these brackets include bearings 5 for a pair of oscillatory bars 6 and 7, each of which is provided on its under side with a longitudinal slot or recess 8 in which the movable parts of the cutters (not shown) engage, after the manner clearly illustrated and described in the aforesaid U. S. Patent No. 1,49 ,241. a,

The trunnions of the bars 6 and 7 which are journaled in the bracket 2 are extended beyond the bearings, and to these extended trunnions are clamped levers, 9 and 10 respectively, as clearly shown in Fig. '1, these levers having split portions which fit around the said trunnions and are clamped thereon by means of bolts 10". The lever 9 is of the bell crank type, and one arm thereof is connected through a link 11 with the lever 10. The other arm of the lever 9 is connected through a link 12 with an arm 13 on a jack shaft 14 journaled at the top of the bracket 2, and this shaft has secured to its other end a depending arm 15 which through a longitudinally adjustable rod 16 attached to. its

is to provide for adjust end is operatively, connected with the lay or other timed moving part of the loom. From the foregoing description, it will be apparent that reciprocation of the rod 16 will result man: oscillationof the bars 6 and 7 with a resultant operation of the cutter blades after a manner which will be readily understood by reference to the aforesaid U; S. Patent No.'1,496,241.

As previously stated, the outer end of the rod 16 is adapted to be attached to the lay or similar reciprocating part of the loom, the

motion beingv reduced by the aforedescribed linkage to that required at the bars'l6 and 7 to properly actuate the shears. Since the throw of the lay varies in different makes of looms, a compensating adjustment is required to make the attachment universal in applica- 16 answers this purpose by providing for attachment of the rod to different points on the lay more or less removed from the main axls.

It'will also be noted that the movements in the bearings and at the pivots is very small, which makes for durability and long use without undue wear and consequent lost motion. I

I claim: 1. In a cutting attachment for l0oms,the combination with an oscillatory cutter bar, of a jack shaft, the axes ofsaid cutter bar 'tion, and the longitudinally adjustable rod and. of said jack shaft being relatively fixed,

an arm on said cutter bar, an arm on said jack shaft, a link connecting said arms, and means including a longitudinally adjustable connecting rod for operatively connecting the jack shaft with a moving part of the loom. I c

2. In a cutting attachment for looms, the combination with a cutter bar, of trunnions on said bar, a supporting structure in which said cutter bar trunnions are journaled, a lever arm connected with one of said trunnions, a jack shaft journaled'in said structure, an arm on said jack shaft, a link interconnecting the said ar1ns, a second arm on said ack shaft, and means operatively connecting said last-named arm with a reciprocating part of the loom.

3. In a cutting attachment for looms, the combination with a su porting bar, of a pair of brackets mounted on said bar,

aligned bearings in said brackets, a tI'llIl-s naled in said hearings, a jack shaft journaled in one of said brackets, the axes of said cutter bar and of said jack shaft being rclatirely lixed, means operatively connecting the jack shaft with the cutter bar, and means operatively connecting the ack shaft with a reciprocating part of the loom whereby said cutter bar is oscillated in timed relation with said reciprocating part.

a. In a cutting attachment for looms, the combination with a bar structure, of a pair of brackets mounted on said base and hav ing aligned hearings, a trunnioned cutter har journaled in said hearings, one of said trunnions being extended beyond the hearing in which it is journaled, a jack shaft journaled in one of said brackets, a lever arm clamped to said extending trunnion, an arm on said jack shaft, a connecting rod connecting said arms, a second arn secured to said jack shaft, and ineansfor connecting said second arm witha reciprocatory part of the 100111 whereby the cutter bar is oscillated in timed relation with said reciprocatory part.

5. A cutting; attachment for looms comprising a pair of parallel cutter hars mounted for oscillation about longitudinal axes, a

hell crank lever connected with one of said liars, an arm on the other of said bars, a link connecting said last-nalned arm with one of the arms of said hell crank lever, a jack shaft journaled for oscillation with its axis relatively fixed with respect to the axes of said cutter bars, means for operatively connecting the other arm of said bell crank lever with said jack shaft, an arm on said jack shaft, and means for operatively eonnectingsaidlast-named arm with a reciprocatory part of thelooni whereby the said cutter bars are oscillated synchronously and in timed relation with said reciprocatory part.

6. In a cutting"attachnicnt forlooms, the combination with an oscillatory cutter bar, of an oscillaton jack shaft, the axis of oscillation of said eutterhar andjajcl; shaft being relatively fixed, meansfor operatively connecting the jack shaft with a moving part of the loom whereby said shaft is oscil lated in timed relation with said Parnand means for ope 'atively connecting; the jack shaft with the cutter bar whereby oscillation of the shaft is trai'ismitted to said liar.

nroininn MARX. 

